Page 1
A map can show roads, rivers, mountains, cities, and borders all on one flat page or screen.
地图能把道路、河流、山脉、城市和边界，一起放在一张平面上展示出来。正文预览
Page 2
But maps do not simply appear. They are made from observation, measurement, and choices about what to show.
不过，地图并不是凭空出现的，它来自观察、测量，以及对要显示什么的认真选择。
Page 3
Long ago, travelers, sailors, and local people shared route knowledge that helped the earliest maps take shape.
很久以前，旅行者、航海者和当地居民提供的路线经验，帮助最早的地图慢慢成形。
Page 4
Mapmakers later used tools to measure distance, direction, land shape, and position more accurately.
后来，制图的人开始用工具更准确地测量距离、方向、地形和位置。
Page 5
A map always simplifies the real world, because a whole landscape cannot fit perfectly onto a small surface.
地图一定会把真实世界简化，因为整片土地不可能完完整整、毫无取舍地缩进一小张纸里。
